Optically Active Oxo(phthalocyaninato)vanadium(IV) with Geometric Asymmetry: Synthesis and Correlation between the Circular Dichroism Sign and Conformation
作者:Nagao Kobayashi、Fumiko Narita、Kazuyuki Ishii、Atsuya Muranaka
DOI:10.1002/chem.200901306
日期:2009.10.5
Oxovanadium(IV) phthalocyanines (VOPcs) with a single‐handed rotation have been prepared, and their right‐ and left‐handed enantiomers resolved on a chiral HPLC column. These enantiomers gave circular dichroism (CD) spectra of opposite signs; the correlation between the CD sign and conformation was obtained by time‐dependent density functional theory (TDDFT) calculations: an enantiomer showing a negative
已经制备了单手旋转的氧钒(IV)酞菁(VOPcs),并在手性HPLC柱上拆分了它们的右手和左手对映异构体。这些对映异构体给出了相反符号的圆二色性(CD)光谱。CD符号和构象之间的相关性是通过时变密度泛函理论(TDDFT)计算获得的:从轴向氧侧看,建议在Q带中显示负号的对映异构体是右手构象异构体,而CD标记为正的将分配给左撇子协调者。尽管具有两个不同烷氧基轴向配体的硅酞菁(SiPcs)已得到相似的拆分,但不存在有意义的CD差异可能反映了与VOPc平面相比SiPc平面的平坦特性。Q波段CD的变化,